Read and fill in the blanks with the given words

to　　so　　on　　may　　with

A：Hello! Are you free after class? We are going to play soccer ________ Class Two this afternoon.

B：Yes. I would like ________. When shall we begin?

A：At half past two, please come at a quarter past two.

B：Oh, I'm afraid I can't come early. I'm going to clean our classroom. I'm ________ duty today.

A：OK. You ________ come a little later, but don't come too late.

--Is this your __________?

--No, it isn't. It's Helen's.

根据录音选择正确的介词填空

Spotty! Come _____.

A. back B. on C. off